mdw@git.distorted.org.uk Git - rhodes/blob - dispatch

   1 #! /usr/bin/perl
   2 ### -*-cperl-*-
   3 ###
   4 ### Job distribution for discrete logs
   5 ###
   6 ### (c) 2017 Mark Wooding
   7 ###
   8
   9 ###----- Licensing notice ---------------------------------------------------
  10 ###
  11 ### This file is part of Rhodes, a distributed discrete-log finder.
  12 ###
  13 ### Rhodes is free software; you can redistribute it and/or modify
  14 ### it under the terms of the GNU General Public License as published by
  15 ### the Free Software Foundation; either version 2 of the License, or
  16 ### (at your option) any later version.
  17 ###
  18 ### Rhodes is distributed in the hope that it will be useful,
  19 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ### GNU General Public License for more details.
  22 ###
  23 ### You should have received a copy of the GNU General Public License
  24 ### along with Rhodes; if not, write to the Free Software Foundation,
  25 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26
  27 use POSIX qw(:sys_wait_h);
  28
  29 @ARGV == 2 or die "usage: $0 DIR WORKERS";
  30 my ($DIR, $WORKERS) = @ARGV;
  31
  32 open my $fh, "<", $WORKERS or die "open($WORKERS): $!";
  33 my @W = ();
  34 my @C = ();
  35 my %P = ();
  36 my @F = ();
  37 while (<$fh>) {
  38   next unless /^\s*[^#]/;
  39   my ($w, $n, @c) = split;
  40   for (my $i = 0; $i < $n; $i++) {
  41     push @W, "$w#$i";
  42     push @C, \@c;
  43   }
  44 }
  45 for (my $i = 0; $i < @W; $i++) { push @F, $i; }
  46
  47 sub state {
  48   system "./rhodes", "done", $DIR;
  49   if ($? == 0) { return 'DONE'; }
  50   elsif ($? == 512) { return 'IDLE'; }
  51   elsif ($? != 256) { die "job broken: done rc = $?"; }
  52   else { $STATE = 'BUSY'; }
  53 }
  54
  55 my $STATE = 'BUSY';
  56 my $RUN = 0;
  57 while ($RUN || $STATE ne 'DONE') {
  58   if ($STATE ne 'DONE') { $STATE = state; }
  59   while (@F && $STATE eq 'BUSY') {
  60     my $i = shift @F;
  61     print "## -> $W[$i]\n";
  62     defined (my $kid = fork) or die "fork: $!";
  63     if (!$kid) {
  64       exec "./rhodes", "step", $DIR, @{$C[$i]};
  65       die "exec: $!";
  66     }
  67     $P{$kid} = $i;
  68     $RUN++;
  69     $STATE = state;
  70   }
  71
  72   my $kid = waitpid -1, 0;
  73   while ($kid > 0) {
  74     next unless exists $P{$kid};
  75     my $i = $P{$kid};
  76     print "## <- $W[$i] rc = $?\n";
  77     push @F, $i; $RUN--;
  78     $kid = waitpid -1, WNOHANG;
  79   }
  80 }